Lens · prime
Pentax Rear Converter 2X (6x7/67)
Pentax
Discontinuedmedium-format
The Pentax Rear Converter 2X doubles focal length at the cost of 2 stops. It suits lenses from 35mm to 400mm; it cannot be used with the leaf-shutter lenses and vignettes with the 75mm Shift and with 500mm and longer lenses. Pentax Rear Converter 2X (6x7/67): 6 elements in 4 groups, 560g.
- Focal length
- 2x
- Max aperture
- 2 stops
- Mount
- Pentax 67
- Format
- medium-format
- Elements / groups
- 6 / 4
Known for
- Extending telephoto reach
- Wildlife
- Sports
Considerations
- Loses 2 stops
- Quality loss
Optical characteristics
Silverlog's editorial rating: our own judgement, not measured data.
Sharpness (wide)4, level 4 of 5
Sharpness (stopped)4, level 4 of 5
Contrast4, level 4 of 5
Flare resistance4, level 4 of 5
CA control3, level 3 of 5
Vignetting control4, level 4 of 5
Distortion control4, level 4 of 5
Bokeh: As per main lens
Rendering: Extends reach
Colour: Neutral
Silverlog's editorial rating, 1 to 5; five is best. Not lab-measured.
Common issues
- Mount wear
Buying guide
Useful accessory. Check mount condition.
Specifications
| Mount | Pentax 67 |
| Focal Length | 2x |
| Max Aperture | 2 stops |
| Min Aperture | N/A |
| Weight | 560g |
Optical design
| Formula | other |
| Elements | 6 |
| Groups | 4 |
| Coating | SMC (Pentax) |
Pricing
- Typical used price (US market)
- $150 - $300
- Mint
- ~$400
Indicative, no dated source.